Angels & Demons State Of Fear Prep: A Novel Hot Commodities : How Anyone Can Invest Profitably in the World's Best Market Haley's Cleaning Hints The Dark Tower (The Dark Tower, Book 7) Haley's Hints The Field: The Quest for the Secret Force of the Universe Women's Bodies, Women's Wisdom

• Hydrogen Bonds.
• Polar molecules, such as water molecules, have a weak, partial negative charge at one region of the molecule (the oxygen atom in water) and a partial positive charge elsewhere (the hydrogen atoms in water). ...
• The force of attraction, shown here as a dotted line, is called a hydrogen bond. Each water molecule is hydrogen bonded to four others. ...
• The hydrogen bonds that form between water molecules account for some of the essential — and unique — properties of water. ...
• The attraction created by hydrogen bonds keeps water liquid over a wider range of temperature than is found for any other molecule its size. ...
• The energy required to break multiple hydrogen bonds causes water to have a high heat of vaporization; that is, a large amount of energy is needed to convert liquid water, where the molecules are attracted through their hydrogen bonds, to water vapor, where they are not. ...
• The evaporation of sweat, used by many mammals to cool themselves, achieves this by the large amount of heat needed to break the hydrogen bonds between water molecules. ...
• The hydrogen bond has only 5% or so of the strength of a covalent bond. However, when many hydrogen bonds can form between two molecules (or parts of the same molecule), the resulting union can be sufficiently strong as to be quite stable. ...
• Multiple hydrogen bonds .

• Investigating the Hydrogen Economy:.
• Hydrogen Discussion Forum.
• The Hydrogen Economy .
• This site continues the lively and productive exchange of information, opinions, and ideas among IEEE members and the hydrogen energy community on technical and policy issues relating to the development of the hydrogen economy started at: The Hydrogen Economy: its impact on the future of electricity.
• The focus of this site is on exploring the look, the technologies, and the societal impact of a hydrogen-based economy. The discussions will examine hydrogen production, its delivery infrastructure, power generation technologies, system interface issues, case studies from North America, Europe and Japan, and how hydrogen fuel will impact the future delivery of electric energy.
• The Resources are documents and links that are relevant to the hydrogen economy discussion. ...

• Hydrogen - H.
• Hydrogen was first recognized as an element by Cavendish in 1766, and named by Lavoisier.
• Hydrogen is a colourless gas.
• Hydrogen is found in the sun and most of the stars, and is easily the most abundant element in the universe. The planet Jupiter is composed mostly of hydrogen, and there is a theory that in the interior of the planet the pressure is so great that metallic hydrogen is formed from solid molecular hydrogen. On this planet, hydrogen is found in the greatest quantities in water, but is present in the atmosphere only in small amounts - less than 1 part per million by volume.
• Hydrogen is prepared commercially by several methods; electrolysis of water, decomposition of hydrocarbons, displacement from acids by certain metals, action of steam on heated carbon, and action of sodium or potassium hydroxide on aluminium.
• It has several other uses, including welding and the reduction of metallic ores, and liquid hydrogen is important in cryogenics and superconductivity studies as its melting point is just above absolute zero.
• Hydrogen is the basis of all life, as part of the DNA molecule.
• There are three isotopes of hydrogen - protium, deuterium and tritium. ... 5 years, and is used in nuclear reactors, hydrogen bombs, luminous paints and as a tracer. ...
• It would be possible to base the entire economy of the Earth on solar and nuclear generated hydrogen, an advantage as hydrogen itself is non-polluting, but the high cost of hydrogen compared with current hydrocarbon fuels makes this unrealistic at present. ...

• Hydrogen Is A Part Of Life   Users of hydrogen are as varied as today's global marketplace. Hydrogen is a key component in the manufacture of chemicals especially ammonia and methanol. ... Hydrogen fuel holds much promise for a future in which everyone can have energy that is efficient and clean. The properties of hydrogen are well known to a variety of producers of consumer goods and services, and understanding the special properties of hydrogen is necessary for its safe use. Can hydrogen be safely handled? The answer is yes.   Millions of pounds of hydrogen are used daily in production plants across the country and around the world (50 million pounds daily in the U. ... The National Aeronautics and Space Administration (NASA) is the largest user of liquid hydrogen in the world. But the public's impression of hydrogen is often the consequence of one well-published incident the Hindenburg. ... In 1937 when the accident occurred, the practice was to allow the hydrogen to be stored in highly combustible materials, a practice which current safety regulations do not permit.   What is often not acknowledged about the Hindenburg tragedy is that because hydrogen dissipates quickly, no Hindenburg fatality was the result of a burn from hydrogen.   Most hydrogen today is derived from light hydrocarbons, ammonia processes and byproducts , the electrolysis of water, or taken as a by-product of petroleum production and chlorine manufacture.
• Hydrogen Gas "Town Gas" Once Lit up America in the 1800's and early 1900's .
• The gas that fueled the lights and furnaces of an earlier America was not the natural gas of today, but a hydrogen-rich mixture called "town gas. " Town gas was manufactured from coal and mainly consisted of raw hydrogen, some methane and small amounts of CO2 and CO. (Town gas or hydrogen gas is still used extensively in some parts of the world, such as China and other Asian countries). ... Unknow to most people today there are over 700 miles of hydrogen pipeline in the U. ... , Germany and England right now! This is small compared to natural gas systems, but it is important to note that there are hydrogen pipelines in operation today that deliver gas to the user without incident. From the town gas experience of the past, to the hydrogen gas experience of today, a solid foundation of knowledge has been established on how to handle hydrogen safely.   Hydrogen Is A Fuel   Hydrogen, in its liquid form, has been used as a fuel in space vehicles for years. Hydrogen has a high combustion energy per pound relative to any other fuel, meaning hydrogen is more efficient on a weight basis than fuels currently used in air or ground transportation. This weight factor makes hydrogen an attractive fuel.   Hydrogen is both flammable and buoyant. ...  Hydrogen gas, like other gases used today, should be used in areas that can be ventilated.

• Hydrogen .
• Hydrogen Safety .
• Hydrogen is a medium for storing energy, otherwise known as an energy carrier. ... Hydrogen's benefits and disadvantages differ from the fossil fuels commonplace in an advanced energy utilizing society such as in the United States. ...
• In order to have a clear picture of hydrogen's advantages and disadvantages, the following paragraph contains the facts surrounding hydrogen. ...
• Hydrogen is an odorless and colorless gas, due to its boiling point of -252. ... According to "Hydrogen in the Energy Sector" by Dr. ... , when comparing energy density by weight, "hydrogen has the highest energy to weight ratio of all fuels. 1 Kg of hydrogen contains the same amount of energy as 2. ... " To clarify a point, hydrogen ranks last when the comparing energy density by volume. Hydrogen possesses 2. ... These facts are relevant to the analogy of the size of a hydrogen tank and the size of a comparable gasoline tank as well as the explosion hazard associated with the fuels. ...
• Hydrogen is non-toxic.
• If a hydrogen spill occurred, the hydrogen would evaporate almost immediately leaving only water behind. ...
• In order to burn, hydrogen requires a higher concentration in the atmosphere than other fuels.
• When hydrogen approaches levels of 4% concentration in the atmosphere, the possibility of it igniting increases greatly. A concentration level of 4% for hydrogen does not seem that high, but when compared to gasoline, which is 1%, hydrogen offers a significantly lower risk of explosion. Gasoline becomes volatile at a concentration 4 times lower than that of hydrogen. ...

• Hydrogen and Fuel Cell Futures.
• The theme of the Conference is "Hydrogen & Fuel Cell Futures". ...
• Trials and demonstrations of hydrogen and fuel cell vehicles .
• Ride Australia's first hydrogen fuel cell buses, and .
• Inspect the only hydrogen refuelling station in the southern hemisphere. ...
• Hydrogen and Fuel Cell Futures Conference .
• Email: hydrogen@congresswest. ...

• Hydrogen .
• Hydrogen Storage.
• Once hydrogen is generated, the question becomes: How do we store the hydrogen? Hydrogen can be stored in a variety of ways, each with specific advantages and disadvantages. ...
• Compressed Hydrogen.
• Liquid Hydrogen.
• Chemically Stored Hydrogen.
• Metal hydrides posses the unique ability to absorb hydrogen and release it later, either at room temperature or through heating of the tank. The total amount of hydrogen absorbed is generally 1% - 2% of the total weight of the tank. ... The percentage of gas absorbed to volume of the metal is still relatively low, but hydrides offer a valuable solution to hydrogen storage. ...
• Metal hydrides offer the advantages of safely delivering hydrogen at a constant pressure. The life of a metal hydride storage tank is directly related to the purity of the hydrogen it is storing. The alloys act as a sponge, which absorbs hydrogen, but it also absorbs any impurities introduced into the tank by the hydrogen. The result is the hydrogen released from the tank is extremely pure, but the tank's lifetime and ability to store hydrogen is reduced as the impurities are left behind and fill the spaces in the metal that the hydrogen once occupied. ...
• Compressed Hydrogen.
• Hydrogen can be compressed into high-pressure tanks. ... A hydrogen gas tank that contained a store of energy equivalent to a gasoline tank would be more than 3,000 times bigger than the gasoline tank. ...

•  >>National Hydrogen Association Webpage   >>NHA News Index.
• Hydrogen Exonerated in Hindenburg Disaster.
• by Jacquelyn Cochran Bokow, Manager of Publications, National Hydrogen Association .
• The memory of the spectacular destruction of the Hindenburg airship affects people’s perception of hydrogen and their acceptance of the gas as an energy source. ... Hydrogen has long taken the blame for the disaster, which effectively ended travel by zeppelin.
• But retired NASA National Aeronautics and Space Administration engineer and long-time hydrogen advocate Addison Bain, who has been conducting extensive research on the incident, concludes that hydrogen played no part in starting the Hindenburg fire. ... The dramatic findings of his research were reported at the National Hydrogen Association’s 8th Annual U. ... Hydrogen Meeting and are the subject of the cover story of the May 1997 issue of the Smithsonian Institution’s Air and Space magazine, published in observance of the incident’s 60th anniversary. ...
• Observations of the incident show evidence inconsistent with a hydrogen fire: (1) the Hindenburg did not explode, but burned very rapidly in omnidirectional patterns, (2) the 240-ton airship remained aloft and upright many seconds after the fire began, (3) falling pieces of fabric were aflame and not self-extinguishing, and (4) the very bright color of the flames was characteristic of a forest fire, not a hydrogen fire (hydrogen makes no visible flame). Also, no one smelled garlic, the scent of which had been added to the hydrogen to help detect a leak.
• This colorized photograph of the Hindenburg airship as it burned gives several proofs to the theory that it was the extreme flammability of the fabric cover, not the hydrogen inside, which caused the disaster. ...
• A Publication of the National Hydrogen Association.

• HYDROGEN.
• Name Hydrogen .
• hydro, water, and genes, forming) Hydrogen was prepared many years before it was recognized as a distinct substance by Cavendish in 1776. ... Hydrogen is the most abundant of all elements in the universe, and it is thought that the heavier elements were, and still are, being built from hydrogen and helium. It has been estimated that hydrogen makes up more than 90% of all the atoms or three quarters of the mass of the universe. ... It is thought that hydrogen is a major component of the planet Jupiter and that at some depth in the planet's interior the pressure is so great that solid molecular hydrogen is converted in solid metallic hydrogen. In 1973, it was reported that a group of Russian experimenters may have produced metallic hydrogen at a pressure of 2. ... It has been predicted that metallic hydrogen may be metastable; others have predicted it would be a superconductor at room temperature. On earth, hydrogen occurs chiefly in combination with oxygen in water, but it is also present in organic matter such as living plants, petroleum, coal, etc. ... The lifting power of 1 ft^3 of hydrogen gas is about 0. ... Production of hydrogen in the U. ... Liquid hydrogen is important in cryogenics and in the study of superconductivity, as its melting point is only 20 degrees above absolute zero. The ordinary isotope of hydrogen, H, is known as protium.
• The ordinary isotope of hydrogen, H, is known as Protium, the other two isotopes are Deuterium and Tritium. Hydrogen is the only element whose isotopes have been given different names. ... One atom of Deuterium is found in about 6000 ordinary hydrogen atoms. ... Tritium is readily produced in nuclear reactors and is used in the production of the hydrogen (fusion) bomb. ...

• Useful Hydrogen, Fuel Cell and Renewable Energy Links, Updated July, 2004 .
• Hydrogen and Fuel Cell Information.
• American Hydrogen Association FAQs on hydrogen and fuel cells .
• Hydrogen Fuel Cells 2004 Canadian conference and trade show .
• Hydrogen solubility in metals From REB Research & Consulting .
• Hydrogen permeability in metals From REB Research & Consulting .
• National Hydrogen Association Hydrogen conferences, job fair .
• The Hydrogen & Fuel Cell Investor Investor news and opinions in the hydrogen and fuel cell industry (my favorite of this ilk) .
• Air Products hydrogen producer (large scale) .
• Little, Mutifeed reformers and PROX to make hydrogen .
• Aspen Systems octane + steam -> hydrogen, also air gels. ...
• mini HYDROGEN Small fuel cells and hydrogen product store .
• REB Research & Consulting Hydrogen purifiers, hydrogen generators, membrane reactors .
• Teledyne Brown Engineering Electrolytic hydrogen generators, PEM fuel cells .
• Hydrogen Energy Research and Resources.
• California Hydrogen Business Council University of California White Mountain Research Station .

• A Sky Full Of Hydrogen .
• Explanation: Interstellar space is filled with extremely tenuous clouds of gas which are mostly Hydrogen. The neutral Hydrogen atom (HI in astronomer's shorthand) consists of 1 proton and 1 electron. ... It is a rare event for Hydrogen atoms in the interstellar medium to switch from the parallel to the anti-parallel configuration, but when they do they emit radio waves with a wavelength of 21 centimeters (about 8 inches) and a corresponding frequency of exactly 1420 MHz. Tuned to this frequency radio telescopes have mapped the neutral Hydrogen in the sky. ...

• Our products, which incorporate our patented fast-cycle pressure swing adsorption (“PSA”) technology, primarily target hydrogen purification in a range of existing industrial and energy markets, including oil refinery and gas processing applications, as well as emerging markets, such as fuel cell systems for distributed power generation and retail service stations which will provide hydrogen fuel for fuel cell powered vehicles. ...
• Our customers in the industrial gas, oil refining and chemical processing industries use our products for applications including hydrogen purification, hydrogen recovery, methane recovery from landfill gas and helium purification. ...
• QuestAir and FuelCell Energy to evaluate production of pure hydrogen from Direct FuelCell® power plants .
• QuestAir H-3200 hydrogen purifier installed at Chevron Hydrogen Energy Station .

Do you have a great site about Hydrogen? Is your Hydrogen site listed here? Would you like a prefered placement of your site in this directory?

It's easy! First place, the HTML from the box below on your page that you would like listed in this directory.

Then use our link submission request with your name, your contact information, and the URL of your site that has a link to this directory. After we verify your link to us, we'll make sure your site stays in our directory, and we'll give it prefered placement here also.

Here is how to make a simple text link to us. Just copy the code in this box to your website:

We can also develop a custom Guide To The Internet for your site. Please request your own custom Guide To The Internet.